Update to 1.6.0p8 - explicit_host_conf in hosts.mk is not defined

Hello together,

while updating to 1.6.0p8

and change the config with

cmk -U

i get for all hosts.mk the message:

name ‘explicit_host_conf’ is not defined

HowTo fix this ???

Greets Bernd

After i have removed the entery`s out of the hosts.mk

all is working just the alias of the Hosts are gone